Finding the Fourth Proportional to 18,115.62, 25,002.18 and 10,158.72

Step by Step Solution

1. Step 1: Write the proportion equation
   18,115.62 : 25,002.18 = 10,158.72 : x
2. Step 2: Convert to fraction form
   18,115.62/25,002.18 = 10,158.72/x
3. Step 3: Cross multiply
   18,115.62x = 25,002.18 × 10,158.72
4. Step 4: Simplify right side
   18,115.62x = 253,990,146.01
5. Step 5: Solve for x
   x = 253,990,146.01/18,115.62
6. Step 6: Final answer
   x = 14,020.51